Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (1 parameter), rich annotations (read-only, idempotent, etc.), and the presence of an output schema (implied by the Returns section), the description is complete. It covers purpose, parameters, return values, examples, and error handling, leaving no gaps for the agent to understand and invoke the tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.